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  • 位置: php7教程 -> php7绑定的扩展库

    socket通信函数

    Example #1 Socket举例:简单的TCP/IP服务器

    这个例子展示了一个简单的对讲服务器。改变地址端口以满足你的设置和执行。 你可以使用类似于这样的命令:telnet 192.168.1.53 10000连接到服务器,(这里是你设置的地址和端口)。 你输入任何东西都会在服务器端输出来,然后回显给你。断开连接,请输入'quit'。

    #!/usr/local/bin/php -q
    <?php
    error_reporting(E_ALL);
    /* Allow the script to hang around waiting for connections. */
    set_time_limit(0);
    /* Turn on implicit output flushing so we see what we're getting
     * as it comes in. */
    ob_implicit_flush();
    $address = '192.168.1.53';
    $port = 10000;
    if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
        echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
    }
    if (socket_bind($sock, $address, $port) === false) {
        echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
    }
    if (socket_listen($sock, 5) === false) {
        echo "socket_listen() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
    }
    do {
        if (($msgsock = socket_accept($sock)) === false) {
            echo "socket_accept() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
            break;
        }
        /* Send instructions. */
        $msg = "\nWelcome to the PHP Test Server. \n" .
            "To quit, type 'quit'. To shut down the server type 'shutdown'.\n";
        socket_write($msgsock, $msg, strlen($msg));
        do {
            if (false === ($buf = socket_read($msgsock, 2048, PHP_NORMAL_READ))) {
                echo "socket_read() failed: reason: " . socket_strerror(socket_last_error($msgsock)) . "\n";
                break 2;
            }
            if (!$buf = trim($buf)) {
                continue;
            }
            if ($buf == 'quit') {
                break;
            }
            if ($buf == 'shutdown') {
                socket_close($msgsock);
                break 2;
            }
            $talkback = "PHP: You said '$buf'.\n";
            socket_write($msgsock, $talkback, strlen($talkback));
            echo "$buf\n";
        } while (true);
        socket_close($msgsock);
    } while (true);
    socket_close($sock);
    ?>
    

    Example #2 Socket举例:简单的TCP/IP客户端

    这个例子展示了一个简单的,一次性的HTTP客户端。 它只是连接到一个页面,提交一个HEAD请求,输出回复,然后退出。

    <?php
    error_reporting(E_ALL);
    echo "<h2>TCP/IP Connection</h2>\n";
    /* Get the port for the WWW service. */
    $service_port = getservbyname('www', 'tcp');
    /* Get the IP address for the target host. */
    $address = gethostbyname('www.example.com');
    /* Create a TCP/IP socket. */
    $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
    if ($socket === false) {
        echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
    } else {
        echo "OK.\n";
    }
    echo "Attempting to connect to '$address' on port '$service_port'...";
    $result = socket_connect($socket, $address, $service_port);
    if ($result === false) {
        echo "socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n";
    } else {
        echo "OK.\n";
    }
    $in = "HEAD / HTTP/1.1\r\n";
    $in .= "Host: www.example.com\r\n";
    $in .= "Connection: Close\r\n\r\n";
    $out = '';
    echo "Sending HTTP HEAD request...";
    socket_write($socket, $in, strlen($in));
    echo "OK.\n";
    echo "Reading response:\n\n";
    while ($out = socket_read($socket, 2048)) {
        echo $out;
    }
    echo "Closing socket...";
    socket_close($socket);
    echo "OK.\n\n";
    ?>